Grain Is Eaten by Cows, and Cows Are Eaten by Humans

question 7

Multiple Choice

Grain is eaten by cows, and cows are eaten by humans. If the ecological transfer efficiency between each trophic level is 10 percent, how much grain is required to produce 70 kg of human biomass?

• A) 7 kg
• B) 70 kg
• C) 700 kg
• D) 7,000 kg
• E) 70,000 kg

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Definitions:

Gravitropism

Growth of a plant in response to gravity

Apical Dominance

The phenomenon where the main, central stem of the plant grows more vigorously than the other side stems due to the concentration of growth hormones at the tip.

Ethylene

A hydrocarbon gas (C2H4) that acts as a plant hormone, influencing growth, development, and responses to environmental stress.

Stimulate

To encourage or cause an increase in activity or a process, often leading to a desired response or function.